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TPE for
Wire & Cable
Flexible SEBS-based TPE compounds for cable mechanical parts - jacketing, strain reliefs, grommets, and plug boots. Overmouldable onto rigid inserts. Electrical and compliance-critical use needs qualification to the relevant standard.
15-90A / 40-52D
Shore hardness
range
40+
Farrprene
grades
100%
Recyclable &
reprocessable
Custom
Colour
matched
OUR MISSION
We engineer flexible, recyclable TPE compounds for cable mechanical parts, matched to your hardness and processing requirements.
01
Recommended grades
Suggested FARRPRENE compounds for this sector, matched by hardness and processing. Open a grade for its full datasheet.
| GRADE | HARDNESS | TYPE | TENSILE | TYPICAL USE |
|---|---|---|---|---|
| FARRPRENE IU450A | 45 Shore A | Injection / Unfilled | 4 MPa | Soft, flexible strain reliefs and cable boots |
| FARRPRENE IF701AS | 70 Shore A | Injection / Filled | 5 MPa | Strain reliefs and connector overmoulds |
Note: Mechanical fit only (flexible accessories, not the conductor insulation). Flame-retardant, halogen-free and electrical performance require a separately qualified grade - contact us.
Typical average values, not a specification. Request the signed datasheet for current values, and ask us to qualify a compound to your exact requirement.
OVERVIEW
In wire and cable assemblies, thermoplastic elastomers are used for the flexible accessories around the conductor: strain reliefs, connector boots, grommets and overmoulded plug bodies. These parts must bend repeatedly at the cable exit without splitting and must grip the jacket without cutting into it. FARRPRENE supplies compounds across the soft-to-firm range used for those accessories. Conductor insulation and jacketing themselves are a separate class of compound with electrical and flame requirements that the published catalogue does not characterise.
KEY TAKEAWAYS
- TPE is used here for mechanical accessories - strain reliefs, boots and grommets - rather than for primary conductor insulation.
- A strain relief needs enough softness to flex at the cable exit and enough body to resist tearing at the moulding line.
- Overmoulded connector bodies are typically injection moulded directly onto the cable jacket.
- Flame retardancy, halogen-free formulation and dielectric performance are not published for these grades and require a separately qualified compound.
02
Hardness selection
Typical Shore A bands by part type. Selection guidance, not a specification - confirm against your own duty cycle. Rigid Shore D grades are a separate range.
| PART TYPE | TYPICAL BAND | WHY |
|---|---|---|
| Soft, highly flexible strain reliefs | 35-50 Shore A | Bends through a tight radius at the cable exit without kinking the conductor. |
| Overmoulded plug boots and grommets | 55-70 Shore A | Holds the moulded form and grips the jacket while still flexing. |
| Connector overmoulds and strain reliefs | 65-75 Shore A | Resists pull-out and abrasion at the connector interface. |
| Firm cable accessories and structural parts | 75-85 Shore A | Retains shape under mechanical load and repeated handling. |
FREQUENTLY ASKED
Questions
engineers ask.
Can FARRPRENE be used as cable insulation?
- Not from the standard catalogue. Primary insulation and jacketing must meet electrical, flame and often halogen-free requirements that these grades are not tested or rated against. FARRPRENE grades are supplied here for mechanical accessories - strain reliefs, boots, grommets and overmoulded bodies. A compound for insulation would need to be formulated and qualified separately.
What hardness is used for a cable strain relief?
- Strain reliefs generally sit between 35 and 70 Shore A depending on the cable diameter and required bend radius. Thin, highly flexible cables use the softer end; heavier cables and connector overmoulds use the firmer end for pull-out resistance.
Are halogen-free or flame-retardant grades available?
- Not in the published catalogue. Both are formulation-level requirements that need a dedicated compound and third-party testing. Contact us with the standard you need to meet and we will develop and qualify a compound against it.
Can TPE production scrap be reprocessed?
- Yes. Thermoplastic elastomers are not chemically cross-linked, so sprues, runners and rejected parts can be reground and fed back into production. This is the main processing difference from vulcanised rubber, which cannot be re-melted once cured.
WIRE & CABLE TPE
Need a high-flex
cable compound?
Our engineering team develops wire and cable-grade TPE compounds tailored to your electrical, mechanical, and environmental requirements.